Instructions for use

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11. HELPFUL HINTS

CAMBERED PROFILES When covering wings with a concave lower surface, tack the ORACOVER

(S-SHAPED SECTION) effectively onto all wooden parts at 90 °C - without shrinking. Then shrink the open bay

without heating the sealed parts. It may be useful to make a simple cardboard

template, to protect the sealed parts of the structure, when using a heat gun.

VENTILATION HOLES When covering open frame structures, tail planes and fins, etc. make sure you have

(PRESSURISATION) made a few internal ventilation holes. If not, drill holes of 1 - 2 mm through all ribs and

webs. This allows hot air to exhaust out of the entire airframe during the covering

process. If hot air is prevented from escaping from a wing bay, it may expand the

covering locally, and prevent shrinking causing wrinkles/slack areas after cooling.

FIRE WALL Bond all edges around engine area with a hot iron to prevent oil seepage under the

ORACOVER . Also coat the inside of the engine area with the two-component paint

®®

ORACOLOR , overlapping this proofer on to the ORACOVER .

FOAM At low range (90 °C) ORACOVER can be applied to foam. Use a test piece of foam

to get the feel of the material. Instead of ORACOVER you can also use

ORASTICK on foam surfaces sticking it directly onto the foam. If reworking with the

iron is necessary make sure the iron temperature does not exceed 95 °C as more

heat may cause damage to the foam surface.

EPP (Expanded PolyPropylene) To achieve a better bonding on rough and uneven surfaces

we recommend the application of a thin layer of ORACOVER EPP Adhesive (ref. no.

®®

0982). Let it dry over night. You can apply the ORACOVER or ORASTICK

covering the next day. As the surface keeps a certain tack it is important to apply the

covering as plain as possible. When ironing and shrinking the covering make sure the

temperature affecting the surface does not exceed 160 °C as the heat may damage the

surface of the EPP.

PAINTING ORACOVER can easily be painted. You will achieve best results using the

®®

ORACOLOR paint system. ORACOLOR is available in the full range of ORA-

®®

COVER colours. ORACOLOR is a true two-component paint, after polymeri-

sation it is fuel-proof and iron-proof. For adequate paint adhesion dull the surface with

000 grade steel wool and clean it with ORACOVER special solvent for iron-on

adhesive (ref. no. 0980).

CLEAN UP Any colour or adhesive left on your iron or smeared on your covering iron can be

removed with a clean rag while the iron is hot. Any residue on the covering can be

removed with ORACOVER special solvent for iron-on adhesive (ref. no. 0980) or

ORATEX special solvent for iron-on adhesive (ref. no. 0969 - 0972). Use these

special solvents on your iron only when the iron is SWITCHED OFF AND COLD!

Do not switch the iron on with special solvent still on its surface! When working with

special solvent make sure the room is aired properly as the special solvent can release

potentially explosive gases.

DECALS Follow manufacturer's instructions on decal applications.

TRIMMING, DESIGNS, Since ORACOVER 's special adhesive will not generate its own bubbles when

MARKINGS, ETC. applied over itself, it can be used for trim and markings. However, good workmanship

is still required because if you are not careful you can entrap air. Applied at low heat,

ORACOVER will bond tightly to itself. For optimum coverage, a darker colour

should go over a lighter one. Smaller designs should be positioned and tacked in place

at one end: Pull design up at the opposite end and iron down starting from the tacked